Blasting cartridge and tamper



E. oRMfsBY BLASTING CARTRIDGE AND TAMPER Filed June 27, 1928 @ci 6, 1931. E, ORMSBY LgS@ BLASTING CARTRIDGE AND TAMPER Filed June 27, 1928 2 Sheets-Sheer. 2

Patented Oct. 6, 1931 ERLE ORMSBY, OFST. LOUIS, MISSQURI, ASSI PANY, or sfr. Louis, Missoula,

GNOB. TO CENTRAL MINE EQUIPMENT COM- A COROP-.ATION OF .MISSOURI BLASTI-NG CARTRIDGE AND TATIPER Application filed June 27, 1928.

blasting carand an object is r1`his invention relates to tridges and tampers therefor, to provide a blasting means Jfor engagement with tamper elements iin adapted to be Spread apart t@ engage in the Wall of the hole in the mineral or substance in which the blasting cartridge is located for Another'object of the invention is to prod vide a tamper lfor cooperative use with blasting cartridges and comprising a number of elements that are spread apart automatically and as an incident to the explosion of the explosives contained in the shell, and by the ef- Ject of such explosion, Vand thereby `engaged I.) tridge having the tamper in the substance or mineral in which the cartridge is embedded so Vas to limit extent of longitudinal movement of the cartridge.

Other objects Will appear from the following description, reference being made to the drawings in Which,

Fig. 1 is a side elevation of a blasting cartridge associated With one form of tamper device and spreader therefor.

Figs. 2, 3 and 4 are, respectively, an outer end elevation, a sectional view on the line 3-'3 of Fig. 17 and an inner end elevationof the device shown in Fig. 1.

Fig. 5 is a view showing a blasting cardevice in connection vwith the inner end thereof.

6 is an enlarged view of the inner end of the cartridge and tamper device of Fig. 5 before the parts of the tamper device are 33 spread apart.

tion having a different Y Fig. 7 is a cross sectional view on the line 7-17 of Fig. 6.

Figs. 8v and'9 aredifferent side elevations of a blasting cartridge of dierent construcorm. of tamper spreader. u

Figs. 10 and 11 are side and end elevations, respectively, of the form of cartridge shown in Fig. 5 having a tamper engaging and spreadingdevice onits outer end.

Fig. 12 is another side elevation yof tridge shown in Figs. 10 and 11.`

Figs. 13 and V14 are different'side elevations the carof another form of cartridge having a tamper cartridge provided With i Serial No. 288,587.v

engaging andspreading device on its outer end.

Fig. 15 is a. side elevation of a spreader device adapted and designed for use in connec- ,tion with the cartridges of Figs. 8 to 14, in-

elusive.

Fig. 16 is an outer end elevation of said tamper device.

The cartridge shown in Figs. 1 and 4 lcomprises a tubular body 1 having an inner end Wall 2 and inclining from one side toward the other. An outlet 3 for the explosive forces is provided at the inner end of the cartridge, which outlet is obtained by removing or omitting a part of the annular Wall of the cartridge from the inner end of the cartridge toward the outer end. This annular Wall may be omitted or removed vto any circumferential or longitudinal extent desired so as to obtain sired area through Which are directed.

The opposite end of the cartridge is closed by an end Wall 4 having a Wedge elongation 5 from which a rod 6 extends axially With respect to the cartridge. `The rod 6 has rigid connection With the wedge and its outer end is threaded.

The tamper device shown in Figs. 1 and 3 comprises a pair of elongated bars 7 having matching longitudinal grooves 8 to receive the rod 6 and diverging inclined Walls 9 on the inner sides of their inner ends to contact with the inclined Walls of the Wedge 5. The

the explosive forces inner portion of the bars 7 are notched circumferentially to provide abrupt shoulders 10. A cap 11 is mounted on the rod 6 and encloses the outer ends of the bars 7 to hold themin Vproper relationship to each other and to the cartridge When said devices are being placed preparatory to exploding the explosive contents of the cartridge. A nut 12 s screwed on the rod 6 and is operative to actuate the cartridge and the bars 7 relatively so as to cause the Wedge 5 to spread apart the inner ends of the bars 7 and engage the shoulders 10 in the mineral or substa-ncein which the device is embedded.

A hole 13 opens through the end Wall 4 to the interior ot the cartridge and is designed an outlet of any del' and adapted to receive a Wire or fuse to function as an ignition device to explode the ex plosive contents of the cartridge. This Wire or fuse may be extended outwardly through a groove 14 along the adjacent edges of the bars 7.

The cartridge of Figs. 5 and 6 comprises a tubular body 15 having a lateral opening 16 near its inner end obtained by removing or omitting a portion of the tubular Wall of the cartridge. The inner end 17 is a solid body of sufficient length to contain a hole in Which one end of a stem 18 is secured. The stem 18 extends axially from the inner end of the cartridge and has a portion 19 flaring toward its extremity and terminating in a circumferential shoulder 20. The tamper device comprises an annular series of bars 21 having circumferential grooves forming abrupt shoulders 22. These bars are held in annular relationship on the stem 18 by a ring 23 seated in a circumferential groove 24 near the ends of said bars that are toward the end of the cartridge 15. hen the cartridge is moved outwardly by the forces of explosion, or otherwise, the flaring portion 19 of the stem 18 forces the ends of the bars 21 radially, causing the shoulders 22 to engage in the material in which the device is embedded, and thus restrict and prevent further outward movement of the device.

The Wall 25 closing the outer end of the cartridge 15 has a hole 26 for reception of the ignition device 27 to explode the explosive contents of the cartridge.

The cartridge of Figs. 8 and 9 comprises a tubular body 28 having a Wall 29 closing its inner end and a Wall 30 closing its outer end and intermediate of its ends is formed with an opening 31 through which the explosive forces are directed. This opening 31 is formed by removing or omitting a part of the Wall of the cartridge to any desired circumferential or longitudinal extent in order to obtain an opening of the desired area. This cartridge may be loaded by placing the explosives first in the ends thereof through the opening 31 and then by placing the desired amount of explosive in the cartridge intermediate of the end-s and opposite the opening 31. The outer end 30 of this cartridge has a Wedge elongation 32 for cooperation With a tamper device of the type shown in Figs. 15 and 16. Said tamper device is quite similar to that shown in Figs. 1 and 3 comprising a pair of bars 33 having at their inner ends diverging inclined Walls 34 to contact With the inclined Walls of the Wedge 32. Thus, when the tamper devices are forced inwardly, or when the cartridge is forced outwardly by the explosive forces, or other- Wise, the inner ends of the tamper devices are spread apart, causing the abrupt shoulders 35 to engage in the material. in which the device is embedded and thus restrict and limit extent of outward movement of the cartridge. This tamper device is provided along one side With a longitudinal groove 33 to receive the ignition device extending to thc cartridge. The Wall 30 is provided With a hole 36 adapted to receive an ignition fuse or Wire.

The cartridge shown in Figs. 10, 11 and 12 is quite similar to that shown in Figs. 5 and 6, except that provision is made for cooperation of the tamper devices for the outer end of the cartridge instead of the inner end. This cartridge comprises a tubular body 37 having a lateral opening 38 near its inner end for directing the explosive forces and having its outer end closed by a Wall 39 provided with a Wedge shaped elongation 40 for cooperation With the tamper device of Figs. 15 and 16, in the manner of their cooperation with the cartridge of Figs. 8 and 9, as previously described. The Wall 39 is provided with a hole 41 adapted to receive an ignition fuse or Wire.

The cartridge of Figs. 13 and 14 comprises a rigid body 42 having in one side a longitudinal groove 43 provided with an inner end Wall 44 and an outer end Wall 45. The end Wall 45 has a Wedge elongation 46 for cooperation With the tamper device of Figs. 15 and 16 in the manner described. The Wall 45 is provided with a hole 47 for reception of the ignition device.

The form of the invention may be Widely varied otherwise than as specifically ,shown and described Without departure from the nature and principle of the invention. I contemplate such variations as may be found advantageous and do not restrict myself in any unessential particulars.

What I claim and desire to secure by Letters Patent is 1. A blasting cartridge adapted to contain explosives to be exploded and having an inner end Wall, a lateral opening at said end Wall of greater length longitudinally of the cartridge than the Width transversely of the cartridge, and a device for limiting extent of longitudinal movement of the cartridge.

2. A blastingcartridge comprising a tu bular body having near one end an opening through one side thereof for directing the explosive forces, said opening being of greater length longitudinally of the cartridge than the transverse Width of said opening, and a Wedge extension from the opposite end of said cartridge.

3. A blasting cartridge comprising a tubular body having an opening through one side thereof for directing the explosive forces, said opening being of greater length longitudinally of the cartridge than the circumferential Width of said opening, a Wedge extension from one end of said cartridge, and a tamper device operative by said extension to engage in the material in Which the cartridge is embedded to limit extent of longitudinal movement of the cartridge.

4. A blasting cartridge comprising a tubular body having an opening through one side thereof for directing the explosive forces, said opening being of greater length longitudinally of the cartridge than the circumerential Width of said opening, a Wedge extension from one end of said cartridge, and a tamper device operative by said extension to engage in the material in which the cartridge is embedded to limit extent of longitudinal movement of the cartridge, said tamper device having a groove along one side thereof adapted to receive an ignition device extending to the cartridge.

5. A blasting cartridge comprisingl a hollov7 body having an elongated lateral opening at its inner end, an inclined inner end Wall at the end of the hollow body forming the end of said opening, and a tapered extension on the outer end of said cartridge forming an end Wall closing the outer end of the cartridge, the outer end of the cartridge being provided with a hole adapted to receive an ignition device.

6. A blasting cartridge comprising a hollow body adapted to contain explosives to be exploded and having a lateral opening for directing' the explosive forces, a hole for receiving an ignition device, a tapered elementin connection with the inner end of said cartridge, and a series of shouldered tamper bars operative by said tapered element to engage in the material in Which the cartridge is embedded to limit extent of longitudinal movement of the cartridge.

7. A blasting cartridge comprising a hollovv body adapted to contain explosives to be exploded and having a lateral opening for directing the explosive forces, a hole for receiving an ignition device, a tapered element in connection With the inner end of said cartridge, a series of shouldered tamper bars operative by said tapered element to engage in the material in which the cartridge is embedded to limitextent of longitudinal movement of the cartridge, and means for holding said bars in assembled relationship.

8. A blasting cartridge adapted to be inserted in a hole in the mineral to be blasted and to contain explosives to be exploded, a tamper device for limiting extent of longitudinal movement of the cartridge toward the opening from said hole in Which said cartridge is mounted, and means in connection with the cartridge for spreading said tamper device by longitudinal movement of the cartridge toward said opening from said hole under impulse of the explosive force.

9. A blasting cartridge adapted to be inserted in a hole in the mineral to be blasted and to contain explosives to be exploded, a tamper device Jfor limiting extent of longitudinal movement of the cartridge toward the opening from said hole in Which said cartridge is mounted, and a spreader in connection With the cartridge for forcing parts of the tamper device laterally into the mineral around the hole in Which the cartridge and tamper device are mounted by longitudinal movement of the cartridge toward said opening from said hole under the impulse of the explosive force.

10. A blasting cartridge adapted to be inserted in a hole in the mineral to be blasted and to contain explosives to be exploded and having a lateral opening of greater length longitudinally of the cartridge than the Width transversely of the cartridge, and an inclined inner end Wall intersecting said opening.

11. A blasting cartridge adapted to be inserted in a hole in the mineral to be blasted and to contain explosives to be exploded, separable elements for limiting extent of longitudinal movement of the cartridge toward the opening from said hole in Which said cartridge is inserted, means for retaining said elements in cooperative relationship With each other and With the cartridge, and a spreader member for separating and spreading said elements to engage in the mineral in the sides oi the hole in Which the cartridge is inserted to limit extent of longitudinal movement of the cartridge toward said opening from said hole under the impulse of the explosive force. f

12. A blasting cartridge adapted to be inserted in a hole in the mineral to be blasted and to contain explosives to be exploded and having an outlet for the explosive forces, means 'or engaging in the mineral at the sides of the hole in Which the cartridge is mounted to limit extent of longitudinal movement of the cartridge toward the opening from said hole under the impulse of the explosive orce, a device for retaining said means in cooperative relationship With the cartridge, and a device for spreading said means to engage in the mineral at the sides ot' the hole in which the cartridge is mounted actuated under the impulse of the explosive force.

ERLE ORMSBY.

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